Sargent 11G37 T-Zone Grade 1 C...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,035.00
$647.57
SGT-11G37

Sargent 11G37 T-Zone Grade 1 Classroom Cylindrical Lock with Single Cylinder

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Model: 28-11G37 LB 26D
From the 11 Line Series Collection
$1,035.00
$647.57
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,035.00
$647.57
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Sargent T-Zone Grade 1 Classroom Cylindrical Lock with Single Cylinder and 7.6 Million Cycle Rating

Professional Grade 1 Cylindrical Lock for Educational Facilities

The Sargent T-Zone 11 Line Series Grade 1 Classroom Cylindrical Lock delivers exceptional durability with independently-verified testing at 7.6 million cycles. This single cylinder lock features modular design for easy field function changes, fits standard 161 door prep with 2 3/4" backset, and accommodates door thickness from 1 3/4" to 2 1/2". Constructed with T-Zone technology to prevent lock twisting and manufactured from 68% post-consumer recycled content for LEED compliance.

Professional Features & Benefits

  • Exceptional Durability: UL Cycle Above and Beyond test completed at 7.6 million cycles (Verification ID: V584148) for lifetime facility performance.
  • Universal Door Compatibility: Fits standard 161 door prep with 1 3/4" to 2 1/2" door thickness range and 2 3/4" backset for versatile installation.
  • T-Zone Construction: Torque-resistant design prevents lock twisting and eliminates through bolts or surface screws for secure installation.
  • Modular Field Service: Easy function changes in the field with modular design reducing maintenance time and inventory requirements.
  • Universal Key System Integration: Accepts SARGENT key systems including Degree and Signature, plus SFIC and Schlage and Medeco LFIC for flexible security management.
  • LEED Sustainability: Made from 68% post-consumer recycled content meeting LEED MR credit 4 requirements for green building projects.
  • Comprehensive Certifications: ANSI/BHMA A156.2 Series 4000 Grade 1, UL-cUL Fire-Rated up to 3 hours, ADA compliant, and Florida Building Code approved.
  • Manufacturer Warranty: 10-year limited warranty for long-term protection and confidence.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1 3/4" to 2 1/2"), standard 161 prep, and 2 3/4" backset requirements.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Educational Facilities and Classrooms
  • Commercial Office Buildings
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities
  • Retail Establishments

Why Choose Sargent Quality?

Sargent T-Zone cylindrical locks deliver professional-grade reliability with independently-verified 7.6 million cycle testing and T-Zone torque-resistant construction. The 10-year limited warranty and Grade 1 ANSI/BHMA certification ensure dependable performance in demanding commercial applications. Engineered with 68% post-consumer recycled content and comprehensive fire rating certifications for facilities requiring both sustainability and safety compliance.

Product Specs

Series:
11 Line Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Lock Function:
Classroom
Product Type:
Leversets
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Cylindrical Locks
Product Function:
Classroom
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Collection:
11 Line Series
Department:
Door Hardware

Sargent 28-11G37 LB 26D – Frequently Asked Questions

1) What does the classroom function on the Sargent 11G37 actually do at the door?
Classroom function, single cylinder: the outside lever is locked and unlocked by key only, and the inside lever always retracts the latch for free egress. There is no inside button or thumbturn, so a teacher cannot lock the door from inside the room. If you need the room lockable from the inside without opening the door, you want a classroom security or storeroom function instead, such as the Dexter C1000 Classroom Security lock.
2) Can the 11G37 be keyed into our existing Sargent master key system?
It can. The 11 Line accepts SARGENT key systems including Degree and Signature, plus SFIC and Schlage and Medeco LFIC. On the order you pick the cylinder type (6 pin standard, 60 Sargent large format interchangeable core, 70 Sargent small format IC, or 30 Schlage key-in-lever prep less core), the keying (keyed different, keyed alike, or master keyed), and the keyway from LA standard plus 40 other Sargent keyways including the C, H, L and R families.
3) Is the Sargent 11G37 approved for a fire-rated classroom door?
Yes. The 11 Line cylindrical lock is UL-cUL fire rated up to 3 hours, ANSI/BHMA A156.2 Series 4000 Grade 1, ADA compliant and Florida Building Code approved. Heavy duty, with UL Above and Beyond cycle testing completed at 7.6 million cycles.
4) How does the Sargent 11G37 compare to the Dexter C1000 classroom lock?
Both are Grade 1 keyed classroom cylindrical levers. The difference that usually decides it is door thickness: the Dexter C1000 classroom lock is listed for 1-3/8 to 1-3/4 inch doors, while the Sargent 11 Line covers 1-3/4 up to 2-1/2 inch. For a thin 1-3/8 inch leaf the Dexter fits and the Sargent does not; for thick doors the Sargent is the one that works. Another Grade 2 classroom option is the Cal-Royal AG03, which is supplied 6-pin Schlage C keyway keyed different on a 2-3/4 inch backset.
5) The opening does not need to be keyed - what should I use instead of the Sargent 11G37?
For a non-keyed opening on the same kind of commercial door, Grade 1 passage cylindrical levers include the Falcon K101, which lists a 1-3/8 inch to 2-1/4 inch door thickness range and a fire rating, the Falcon T101 heavy duty passage lever, the Corbin Russwin CL3110 passage/closet lever, and the Dexter C1000 passage lever with clutching. The Sargent 11G37 is a keyed classroom lock with a single cylinder, so it is the wrong choice where no key control is wanted.
6) What is the closest Grade 1 classroom cylindrical lever lock to the Sargent 11G37 from another manufacturer?
The Dexter C1000 Series classroom lock is the nearest match in function and grade - it is a Grade 1 cylindrical classroom lever lock, keyed, with clutching levers, and lists a door thickness range of 1-3/8 inch to 1-3/4 inch. The Sargent 11G37 is also Grade 1 classroom function and covers 1-3/4 inch to 2-1/2 inch doors, so on thicker doors the Sargent is the one that fits. Keying is the other decision point: the 11G37 can be ordered with Sargent large format or small format interchangeable cores or a Schlage key-in-lever prep.
7) What is the difference between the Sargent 11G37 classroom lock and a classroom security lock?
The Sargent 11G37 is a classroom function with a single cylinder - the outside key locks and unlocks the outside lever. A classroom security function, such as the Dexter C1000 Series classroom security lever lock, uses cylinders on both sides so the lock can be secured from inside the room without opening the door. If the district requires lockdown from inside the classroom, the single-cylinder 11G37 will not satisfy it.
8) The door needs to unlock on a fire alarm - is the Sargent 11G37 the right lock?
No, the 11G37 is a mechanical keyed classroom lock with no electrical function. For electrified cylindrical lever locks, the Corbin Russwin CL33903 is a Grade 1 fail safe lever running on 12VAC/DC, listed for 1-3/4 inch to 2 inch doors, and is available with an NZ lever and D rose. Use the 11G37 where access is controlled by key only.
9) My doors are 2-1/4 inches thick - which cylindrical lever locks will fit besides the Sargent 11G37?
The Sargent 11G37 covers 1-3/4 inch to 2-1/2 inch door thickness, which is the widest range here. The Falcon K101 passage lever lists 1-3/8 inch to 2-1/4 inch. Most others stop lower - Corbin Russwin CL3110 and CL33903 list 1-3/4 inch to 2 inch, Hager 2510 and 2525 list 1-3/8 inch to 2 inch, and Arrow GL01 lists 1-3/4 inch to 2 inch. For a keyed classroom function on a thick door the 11G37 is the fit.
10) I am standardizing on Schlage keys - can I still use the Sargent 11G37, or do I need an adapter like the Accentra 107S?
The Sargent 11G37 can be ordered with a Schlage key-in-lever cylinder prep less core, so it drops onto an existing Schlage key system without a separate adapter. The Accentra 107S is a Schlage cylinder adapter kit intended for Yale hardware, so it is not the path for a Sargent bored lock. Cal-Royal AG00 and AG03 levers also list 6-pin Schlage C keyways.
11) Do I need to specify handing when I order the Sargent 11 Line classroom lever?
No handing to call out. The 11G37 is non-handed, so one lock covers left and right hand openings and you can standardize a single part across a building. What you do have to specify is backset, strike, cylinder type, keying, keyway, lever style and finish.
12) Can we change the 11G37 from classroom to another function later without buying a new lock?
Yes, the 11 Line is modular and function changes can be made in the field, which is why facilities carrying a mix of classroom, storeroom and passage openings can stock fewer spare parts. The T-Zone body is torque resistant and mounts without through bolts or surface screws, so the door face stays clean.
13) Can I order the 11G37 with a Schlage core instead of a Sargent cylinder?
Yes. Cylinder option 30 is a Schlage key-in-lever cylinder prep supplied less core, so you drop in your own Schlage cores and keep the building on one key system. If you run interchangeable core instead, option 60 is Sargent large format (FSIC) and option 70 is Sargent small format (SFIC). Straight conventional keying uses the 6 pin standard cylinder.
14) Can I use a storeroom lever instead of the Sargent 11G37 on a classroom door?
Only if you want the outside lever locked at all times. Storeroom options include the Cal-Royal AG05 Grade 2 storeroom lever with a deadlocking latchbolt and the Hager 2580 Grade 2 storeroom lever with a Withnell lever, both listing a 1-3/8 inch to 1-3/4 inch or 1-3/8 inch to 2 inch door range. The Sargent 11G37 classroom function lets the teacher key the outside lever to a passage state, which a storeroom lock does not do.
15) Are Emtek, Baldwin and Kwikset lever sets substitutes for the Sargent 11G37?
No. The Baldwin Estate 5103 is offered in passage, privacy and half dummy functions, Emtek Classic and Arts and Crafts leversets are dummy pairs or keypad sets, and the Kwikset 200BRNL Breton is a Grade 3 passage lever for 1-3/8 to 1-3/4 inch doors. None of those is a keyed classroom function, and none carries Grade 1. The Sargent 11G37 is a commercial Grade 1 keyed classroom cylindrical lock rated ANSI/BHMA A156.2 Series 4000 with UL-cUL fire rating up to 3 hours.
16) I need keypad access rather than a key on a classroom door - what replaces the Sargent 11G37?
Mechanical and electronic keypad lever options include the Lockey 1150 heavy duty mechanical keypad lever set with double combination, listed for 1-1/8 inch to 2 inch doors, the Delaney LP250 Grade 2 electronic keypad leverlock, and the Emtek Classic keypad leverset. The Sargent 11G37 is a mechanical keyed lock and accepts Sargent Degree and Signature key systems, SFIC, and Schlage and Medeco LFIC, so it is the choice when the door must stay on an existing master key system.
17) Which lock should I use on a padded or institutional room instead of the Sargent 11G37?
Asylum or institution function locks key from both sides with no free-turning lever: the Dexter C1000 Series asylum lock (F87) is Grade 1 and lists a 1-3/8 inch to 2 inch door range, and the Arrow MK33-BD-CS is a heavy duty Grade 2 asylum lock with a ball knob and conventional Schlage C keyway cylinder. The Sargent 11G37 is a single cylinder classroom function, which leaves the inside lever always free.
18) Is a Grade 3 entrance lever an acceptable substitute for the Sargent 11G37 on a school corridor door?
Grade 3 entrance levers such as the Cal-Royal AUS00, which lists 1-3/8 inch to 1-3/4 inch door thickness, and the Callan Artino entrance leverset are built to a lighter duty standard and are entrance rather than classroom function. The Sargent 11G37 is heavy duty Grade 1 to ANSI/BHMA A156.2 Series 4000 with UL cycle testing completed at 7.6 million cycles, which is the level typically specified for school corridor traffic.
19) What lever styles, roses and finishes does the Sargent 11 Line come in?
Four lever designs (B, J, L and P) and four roses: B and O at 2-3/4 inch, L at 3-1/8 inch and E at 3-1/2 inch. If you are covering old fastener holes or a previous knob rose, the 3-1/2 inch E rose gives the most coverage. Fourteen finishes run from 03 bright brass and 04 satin brass through 26D satin chrome to BSP black and WSP white suede powder coat, so matching existing openings across a building is straightforward.
20) I need matching dummy trim for doors next to the Sargent 11G37 levers - what are the options?
For inactive leaves, Grade 1 dummy trim options include the BEST 9K Series 1DT single dummy trim cylindrical lever, which is heavy duty and non-keyed, and the Accentra 455LN Augusta Grade 1 single dummy cylindrical lever. The BEST 7KC Series 1DT is the medium duty Grade 2 equivalent. The Sargent 11G37 itself is a keyed, latching classroom lock and is not made as dummy trim.
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Can I return it if it doesn’t work for me?
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Does the Sargent 28-11G37 LB 26D come with a warranty?
Absolutely. The Sargent 28-11G37 LB 26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sargent 28-11G37 LB 26D?
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